For Terry's Cat House? :-)
"Orbiting scroll expander element 221 and orbiting scroll air compressor element 240 are fixedly secured to a central support frame 253, which includes a pair of spaced plate members 256, 257, by first and second truss structures 260 aid 263 respectively. Spaced plate members 256 and 257 are interconnected by a plurality of circumferentially spaced connecting tubes by means of a plurality of bolts 269 and nuts 271. By this construction, orbiting scroll expander element 221 and orbiting scroll air compressor element 240 are integrally connected to form a unitary structure. Therefore, orbiting of one of the scroll elements will also cause orbiting of the other scroll element."
Under $500.00 using junkyard Mitsubishi FX105V Scroll Compressor/Modified Expander
plus a homebrew combustion chamber, belted together.
